Reverse 'Hide/Show all' icon for thread view

app/javascript/mastodon/features/status/index.jsx

@@ -658,7 +658,7 @@ class Status extends ImmutablePureComponent {
           showBackButton
           multiColumn={multiColumn}
           extraButton={(
-            <button type='button' className='column-header__button' title={intl.formatMessage(status.get('hidden') ? messages.revealAll : messages.hideAll)} aria-label={intl.formatMessage(status.get('hidden') ? messages.revealAll : messages.hideAll)} onClick={this.handleToggleAll}><Icon id={status.get('hidden') ? 'eye-slash' : 'eye'} icon={status.get('hidden') ? VisibilityOffIcon : VisibilityIcon} /></button>
+            <button type='button' className='column-header__button' title={intl.formatMessage(status.get('hidden') ? messages.revealAll : messages.hideAll)} aria-label={intl.formatMessage(status.get('hidden') ? messages.revealAll : messages.hideAll)} onClick={this.handleToggleAll}><Icon id={status.get('hidden') ? 'eye' : 'eye-slash'} icon={status.get('hidden') ? VisibilityIcon : VisibilityOffIcon} /></button>
           )}
         />